Electric table attachment.



D. H. KENDELHARDT.

ELECTRIC TABLE ATTACHMENT. APPLICATION FILED OCT. 6. 1914.

1,1 84,539. Patented May 23, 1916.

2 SHEETS-SHEET I.

D. H. KENDELHARDT.

ELECTRIC TABLE ATTACHMENT.

APPLECATION FILED OCT-6,1914.

3 m Aw UNITED STATES PATENT @lBFl-IGE.

DANIEL H. KENDELI HARD'T, OF BROOKLYN, NEW YORK.

ELECTRIC TABLE ATTACHMENT.

To all whom it may concern:

Be it known that I, DANIEL H; KENDEL- HARDT, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Electric Table Attachments, of which the following is a specification.

his invention relates to electric table at tachments and it consists in the novel fea- 'tures hereinafter described and claimed.

. detailed edge elevation of the device.

An object of the invention is to provide an attachment especially adapted to be used in, connection with extension tables for the purpose of giving a signal to" summon a servant to the table or dining room when required. The attachment is intended to be used for operating an electric signal and consists of spring actuated drums journaled upon the table with wires connected to the drums one a push button and the other set of wires being provided with a plug adapted to be used in conjunction with a socket which is placed in the floor below the table. The drums are mounted in a frame for turning movement with relation to each other. The set of wires carrying the said push button are led to one end of the table and another set of wires is connected with the frame and the last mentioned set of wires is provided with a push button. Another set of wires is led to the opposite end of the table. The drum and drum frame are so arranged that when either one of the push buttons are operated an electric connection is established between the advantages incident to this arrangement of the wires and drums are that the table may be moved over the floor and at the same time the wires will be maintained sufliciently taut to prevent them from dragging on thefloor also the table may be extended or contracted and the wires will bemaintained in a proper taut position.

In the accompanying drawings :Figure 1 is a side elevation of an extension table with the device applied thereto. Fig. 2 a

a 1 3 is a transverse sectional view of the drur s of the device. Fig. 4 is a detailed sectional view of one of the drums of the device cut on the line 4'4 of Fig. 3. o a

As illustrated in Fig. 1 of the drawings the device is applied to an extension table 1 of the usual form having removable leaves Specification of Letters Patent.

set of wires being provided with plug and the push button. The- 2. Brackets 3 are secured to the under portion of the frame of the table 1 and carry of electricity. ductors' of electricity are end portions of the shaft 4 between the brackets 3 and the said disks 5 have electric contact with the shaft 4. The disks 5 are provided at their inner sides and in the vicmity of their edges with annular grooves 6. A disk 7 is mounted at the intermediate portion of the shaft 4 and is insulated from the same by means of a sleeve 8. If desired conducting plates 9 may be provided at the opposite sides of the disk 7. The disk 7 is provided at its opposite sides and in the vicinity of its edges with annular grooves 10. Drums 11 are turnably mounted be tween the disks 7 and 5 and the edge portions of the said drums grooves 10 and 6 respectively of the said disks as best shown in Fig. 3 of the drawings. The drums 11 are formed from insulating material and the said drums are provided at their edges with plates 12 which have contact with the bottoms of the grooves 10 and 6 as shown in Fig. 3. Spiral springs 13 are located within the drums 11 and are connected at one end with the shaft 14 and at their other end with the drums 1 Wires 14 are connected one with the disk 7 an the other with one of the disks Sand the said wires are trained through a guide 15 attached to the under portion of the table 1 and are connected to a push button 16 of any usual pattern. Wires 17 are connected mounted at the i at one end with the plates 12 mounted upon 'one of heated with a plug 21 which is adapted to v be inserted in a "socket (not shown) placed in the floor of the room. It is of course understood that the said socket is connected in an electric circuit bell or other signal.

When the plug 21 is in the socket, hereto- Patented May 23, 1916. Application filed Gctober 6, 1914.. Serial 0. 865,334. v

are received in the and is provided with a fore referred to, and when the push button 12 mounted upon thefirst mentioned drum .11 "and along the other wire 20 back tothe plug 21. Thus the circuit is completed and the alarm which is connected with the socket is sounded.

If the push button 19 is closed the current passes from the plug 21 along one of the wires.20 as hereinbefore described to one of the drums 11 thence alon the adjacent disk 5 tothe shaft 4 thence a ong the shaft 4 to the other disk 5 thence along one of the wires 17 to theclosed plug 19 thence along the other wire 17 to the plate 12 mounted upon the drum 11 havin contact with the disk 7 thence along the disk 7 and the plate 12 upon the other drum to the wire 20 and thence along the said wire 20 back to the plug'21. 'Therefore it will be seen that the alarm may be sounded or given by a person at either end of the table 1; Inasmuch as the brackets 3 are fixed with relation to the guide 15 no provision is made for taking up any slack which may occur inthe wires 14. But inasmuch as'the device is applied to an extension table means is provided for taking up any slack which may occur in the wires 17 when the leaves 2 are removed from the table 1. This is 'done by means of the spiral spring 13 which is located within the drum 11 to which the wires 17 are attached. As the wires 17 become slack the tension of the spring 13 located in the said drum causes the said drum to turn whereby the wires 17 are wound upon the drum and thus the said wires 17 are maintained in a taut condition engagement with the plug as indicated in Fig. 1 of the drawings. By this arrange ment it will beobserved that the leaves 2 may be readily detached from the table or inserted therein and at the same time the 1 wires will not sag and become tangled in objects upon the floor of the room. Furthermore the table may be readily moved within the length of the wires 20 so that the floor of the room maybe swept or cleaned and the wires 20 will not sag or fall upon the surface of the floor. I c

Having thus described the invention what is claimed is v 1. A device as described comprising spring actuated drums, said drums being turnable with relation to each other andmeans' located at the drums for establishing electric connection between the drums.

2. In adevice of the character described a shaft, outer disks mounted upon the shafts and electrically connected with the same, an inner disk mounted upon the shaft and insulated from the same, drums turnably mounted between the outer and inner disks, springs connected with the shaft and connected with the drums, by'thel drums for establishing electric connection between the outer and inner disks.

and means carried In testimony .whereof I afiix my signature I in presence of two witnesses.

DANIEL H. KENDELHARDT.

Witnesses:

JOHN A. Donnerr, M. E. LAUGHLIN. 

